Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2869ffbdaa15aad…

MALICIOUS

PDF

42.4 KB Created: 2021-05-10 13:53:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 49186330e884a39edff4982749178a33 SHA-1: c29f71bca246fb0eb96793364fad24d0b8db46fc SHA-256: c2869ffbdaa15aadcc88dd5787b064cd2b5a18c4a4ed0d94148aa320ebecc04e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is designed as a lure, presenting a "Robux Download" or "game hack" to trick users into clicking malicious links. The embedded URLs, such as https://netcdn.xyz/app/431946152/robux-download-game-hack, are associated with known malicious redirector infrastructure. The document's structure and content strongly suggest a phishing or scam attempt to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9778

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.xyz/app/431946152/robux-download-game-hack In PDF document text
    • http://www.psychom.com/storage/editor/files/coin-master-hack-tool-2021_GM406889139.pdfIn PDF document text
    • http://www.psychom.com/storage/editor/files/coin-master-free-spins-april-2021_GM406889139.pdfIn PDF document text
    • http://www.psychom.com/storage/editor/files/free-robux-pin-codes_GM431946152.pdfIn PDF document text
    • http://www.psychom.com/storage/editor/files/how-do-you-get-free-roebucks_GM431946152.pdfIn PDF document text
    • http://www.psychom.com/storage/editor/files/master-coin-hack-game_GM406889139.pdfIn PDF document text
    • http://www.psychom.com/storage/editor/files/coin-master-hack-version-2021-download_GM406889139.pdfIn PDF document text
    • http://www.psychom.com/storage/editor/files/coinmaster-spins_GM406889139.pdfIn PDF document text
    • http://www.psychom.com/storage/editor/files/coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://www.psychom.com/storage/editor/files/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://www.psychom.com/storage/editor/files/free-robux-easy_GM431946152.pdfIn PDF document text
    • http://www.psychom.com/storage/editor/files/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00003d69.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3D69 24548 bytes
SHA-256: ae30479d7dcf01b650c77556c80d7eaceb1b35302284e05c1e596658bd9af55f
font_01_sfnt_off0000758e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x758E 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off00008236.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8236 18656 bytes
SHA-256: 643f530bc401710360b2f74e2e590a7f6ab15445ebda3165faa7e078ea1fa698

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